1. Department of Forest and Wildlife Ecology, University of Wisconsin , Madison, Wisconsin , USA
2. U.S.D.A. Forest Service, Rocky Mountain Research Station , Albuquerque, New Mexico , USA
3. Biology Department, University of New Mexico , Albuquerque, New Mexico , USA
4. U.S.D.A. Forest Service – Region 5 , Sacramento, California , USA
5. Tanner Environmental Services , Alameda, California , USA
6. Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota , St. Paul, Minnesota , USA
7. U.S. Forest Service, Pacific Southwest Research Station , Davis, California , USA